LONDON AP – Three men accused of helping plan the 2005 London transit bombings were acquitted Tuesday of playing a part role in the plot, a blow to investigators’ hopes of convicting anyone for the worst attack on Britain since World War II.

A jury in London found Waheed Ali, Sadeer Saleem, and Mohammed Shakil not guilty of conspiring to cause explosions. They were accused of working with four suicide bombers who attacked three subway cars and a bus July 7, 2005, killing 52 passengers and themselves.